Stocks mounted a broad advance on Monday after a key healthcare reform bill advanced in the Senate and brokerages upgraded Dow components Intel Corp and Alcoa Inc on improving profit prospects.

* With the year winding down, investors moved to scoop up shares in the hope that Wall Street would notch further gains heading into the new year as the economic recovery takes hold.

* Based on the latest available data, the Dow Jones industrial average <.DJI> shot up 85.25 points, or 0.83 percent, to close unofficially at 10,414.14. The Standard & Poor's 500 Index <.SPX> gained 11.58 points, or 1.05 percent, to finish unofficially at 1,114.05.

* The Nasdaq Composite Index <.IXIC> climbed 25.97 points, or 1.17 percent, to end unofficially at 2,237.66 -- its highest close in 15 months.

(Reporting by Ellis Mnyandu; Editing by Jan Paschal)